Air-heating apparatus



Oct. 27, 9 x r I 1,558,493

. C. D. MOSHER AIR HEATING APPAR TUS Filed 1925 3 Sheets-Shet 1.

ENTOR ATTORNEY Oct. 27, 1925.

. C. D. MOSHER A R HEATING APPARATUS Filed Aug. 14, 192:: a Sheets-Sheet5 ATTORNEY V i atcnted (lot. 2?, 1925. I

urn STATES. PATENT OFFICE.

CHARLES D. KOSHER, OF NEW YORK, N. Y.

AIR-HEATING Arimna'rus.

Application filed August 14, 1923. Serial No. 657,303.

To aZZ whom it may concern."

of the transfer of heat, from the outgoing hot gases and products ofcombustion from the fuel of a furnace to the incoming air for thecombustion of said fuel.

To obtain the required results, an air heater is made up of removableair chambers with corrugated surfaces, that provide sinuous passages forair and gases that flow through the heater in opposite directions.

It is well known that a. gasfor air will flow along a straight or planesurface and closely adhere thereto, by virtue of which only a thinstratum ofthe air or gas is heated from any heat emanatin from the planesurface, the said stratum ormin an insulator of heat and permitting butllttle heat to be transmitted to the other strata of the mass of air. Bymeans of corrugated plates, as employed in this apparatus,a zi zag flowof hot gases is obtainedon one si e of the plates and a zigza counterflow of air on the opposite sides 0% the plates.

The corrugated plates are contained in an air heater, in which hot gasesflow in one direction on one side of the plates, and the air to beheated flows in the opposite direction on the opposite side of theplates.

The corrugated surfaces of the plates provide zigzag or sinuous passageswhich cause the air and hot gases to constantly change their directionof flow at each impingement on the surfaces of the plates. Both the airand hot gases as they leave the surface of one corrugation impingeagainst the surface of the nest corrugation in a direction making an.angle from its previous direction of )dow. u

By this means stratification isbroken up and ,the amount of heattransferred from The invention is founded on the principle the hot gasesto the air is per unit of surface.

The organization of the invention comprises essentially an air heaterwith a casing enclosing kltac able air chambers or units adjacent toeach other in a row and havin pfirrulgated side walls. Air flows throughgreatly increased bustion from the uel flow through the heater betweenthe outer faces of the chambers in an opposite direction. Heat isthereby trans itted from the hot gases to the air through the walls ofthe air chambers.

In the accompanying drawings Fig. 1 represents a side elevation of theair heating a paratus connectedto a steam generating p antshown partlyin section; Fig. 2 shows an enlarged front elevation of an air heater;Fig. 3 indicates a partial section of Fig. 2 on the line 3, 3; Fig. 4represents a partial section of Fig. 2 on the line 4, 4; Fig. 5 shows aright hand side view and section on the line 5, f Fig. 2; Fig. 6represents a fragmentary enlarged side elevation of a detac able chamberor unit; Fig. 7 shows a left hand side View of Fig. 6; Fig. 8 is a topplan view of Fig. 6 and Fig. 9 indicates an enlarged fragmentary portionof Fig; 4. "Referring to Fig. 1 a. partial longitudinal section of asteam generator is indicated in its entirety by the letter A, withthefilrnace 20, combustion chamber 21, tubes 22, ash pit 23 and the rearwall 25. A smoke stack 30 is connected to an opening in the Wall 25, bymeans of the gasconduit 31.

The air heater is indicated in its entirety by the letter B, and itsupper end is con- Iiected to the conduit 31.

An air duct C having a. damper 32 connects the upper portion of the airheater B and the ash pit 23. A gas conduit D with the damper 33 connectsthe gas outlet of the air heater B and the lower end of the smoke stack30.

embers on its way to the fuel of a furnace, and hotpases and products ofoom- A blower- E is connected to the lower portion of the air heater B.

A fan F for induced draft is interposed 4:3 b is inn" webs b v r be unem'mi gnnied name 351, of

:5 ml ii shambz, 228G553 11 and 3 st? ire 2306mm irsns 11 bet Qufin REESlaces of the corrugated plates 106 of the air chambers G. I

The air chambers (i are tightly clamped in a- I'OW in the air heater B,by means of the 2 bars 85 and 88, the flanges 91 of the Z bars bearingagainst the channel irons 112 and 113 of the air chambers at thcends'oi'the row thereof. The Z bars are clamped in place by means of the bolts93. Any of the air chambers (i can easily be removed from the casing ofthe air heater B, by releasing the nuts from the studs 66, the nuts ofthe front menlbers of the frames 40 and and removing the plate '80,after disengaging the bolts "i6 and 78 respectively from the frames 40and 45.

Various modilications'may be made in the invention within the spiritof'the. claims and the, present exemplitication is to be taken asillustrative and not limit-ative thereof.

Having described my invention What I desire to secure by Letters Patentand claim is:

l. -In an air heater thecombination of a casing, a pair of adjustablebars at each of the sales of the casing, a plurality of air chambersarranged in a row in the casing with the ends of said row bearingagainst the pairs of bars, corrugated walls for each of the chambers,each of said chambers havmg an opening at its upper end and an openingat its lower end and means to clamp the adjustable bars to the casingand to bear against said chambers at the-ends of-the row to clamp-thechambers in place in spaced position, I

2, an air heater the combination of a 1 casing, a pair of adjustablebars at each of the sides of the casing, a plurality of air chambersarranged in a row in the casing, corrugated Walls for each chamber, :anelement encasing the 'front and'rear portion of each chamber, each frontelement havinga pair of openings, movable bars at the sides of thecasing, and means to clamp the bars to the casing and to bear againstsaid chambers at the ends of the row to clamp them in place with saidelements bearing against each other.

In an, air heaterthe combination of a,

casing, 21 pair of adjustable bars at each of the sides of the casing, aplurality of air chambers arranged in a row in 'l'herasing, corrugatedside walls spaced apart for each chamber, channel irons cncasing thefront and rear portion of each chamber, one of said channel irons havinga pair of openings leading into its chamber, movable bars at thesidesot' the casing and means to clamp the bars to the casing and to bearagainst said channel irons at the ends of said row to clamp'the chambersin place with passages between them.

. 4:. In an air heater the combination ofa casing, a plurality of airchambers dctachably located in a rowin the casing, corrugated side Wallsspaced apart tor each chamber, channel irons encasing the trout and rearportion of each chamber, one of the channel irons of each chamber havinga pair of openings leading'to its interior, the adjoining faces of saidchannel irons of adjacent chambers normally bearing a ainst each other,adjustable Z bars atthe si es of the casing with one of the flanges ofeach normally bearing against the channel irons of the air chambers ofthe ends of the row, angle irons'at the sides and corners of the casingwith one of the flanges of each adjacent to the other flanges of the 2bars and clamping bolts connectin' the latter flanges of the Z-bars andto adjacent flanges of the angle irons at the corners of the casing.

Signed at the borough of Manhattan cit of New York, in the county of Newor and State of New York, this 8th August,'A. D. 1923; i

' CHARLES D. MOSHER- day of

